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Picking values from Ruby hashes

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Matthew Bass

Posts: 468
Nickname: pelargir
Registered: Dec, 2005

Jared Richardson and Matthew Bass are independent software consultants
Picking values from Ruby hashes Posted: Jun 26, 2008 3:07 PM
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Original Post: Picking values from Ruby hashes
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Want to pick a certain set of key/value pairs from a Ruby hash? You might do this: hash = {:foo => "bar", :bar => "baz", :baz => "boo"} hash.select { |k,v| [:foo, :bar].include?(k) }   # returns [[:foo, "bar"], [:bar, "baz"]] Kind of messy. We can do better by reopening the Hash class this way: class Hash   def pick(*values)     select { |k,v| values.include?(k) [...]

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